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From: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
To: sagark@eecs.berkeley.edu, palmer@sifive.com,
	Alistair.Francis@wdc.com, kbastian@mail.uni-paderborn.de
Cc: qemu-riscv@nongnu.org, peer.adelt@hni.uni-paderborn.de,
	richard.henderson@linaro.org, qemu-devel@nongnu.org
Subject: [Qemu-devel] [PATCH v4 26/35] target/riscv: Remove shift and slt insn manual decoding
Date: Fri, 18 Jan 2019 14:14:47 +0100	[thread overview]
Message-ID: <20190118131456.32451-27-kbastian@mail.uni-paderborn.de> (raw)
In-Reply-To: <20190118131456.32451-1-kbastian@mail.uni-paderborn.de>

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Peer Adelt <peer.adelt@hni.uni-paderborn.de>
---
v3 -> v4:
    - refactor tcg_gen_set_cond_tl(TCG_COND_LT,..) into gen_slt function
      and reuse gen_arith(..., &gen_slt) for all trans_slt functions.
    - Add missing sign extension to trans_srlw/sllw
    - Made rs2 == 0 a special case of srlw/sllw

 target/riscv/insn_trans/trans_rvi.inc.c | 98 +++++++++++++++++--------
 target/riscv/translate.c                | 59 +++++----------
 2 files changed, 86 insertions(+), 71 deletions(-)

diff --git a/target/riscv/insn_trans/trans_rvi.inc.c b/target/riscv/insn_trans/trans_rvi.inc.c
index eb5ba54000..7454c23f74 100644
--- a/target/riscv/insn_trans/trans_rvi.inc.c
+++ b/target/riscv/insn_trans/trans_rvi.inc.c
@@ -220,30 +220,25 @@ static bool trans_addi(DisasContext *ctx, arg_addi *a)
     return gen_arith_imm(ctx, a, &tcg_gen_add_tl);
 }
 
-static bool trans_slti(DisasContext *ctx, arg_slti *a)
+static void gen_slt(TCGv ret, TCGv s1, TCGv s2)
 {
-    TCGv source1;
-    source1 = tcg_temp_new();
-    gen_get_gpr(source1, a->rs1);
+    tcg_gen_setcond_tl(TCG_COND_LT, ret, s1, s2);
+}
 
-    tcg_gen_setcondi_tl(TCG_COND_LT, source1, source1, a->imm);
+static void gen_sltu(TCGv ret, TCGv s1, TCGv s2)
+{
+    tcg_gen_setcond_tl(TCG_COND_LTU, ret, s1, s2);
+}
 
-    gen_set_gpr(a->rd, source1);
-    tcg_temp_free(source1);
-    return true;
+
+static bool trans_slti(DisasContext *ctx, arg_slti *a)
+{
+    return gen_arith_imm(ctx, a, &gen_slt);
 }
 
 static bool trans_sltiu(DisasContext *ctx, arg_sltiu *a)
 {
-    TCGv source1;
-    source1 = tcg_temp_new();
-    gen_get_gpr(source1, a->rs1);
-
-    tcg_gen_setcondi_tl(TCG_COND_LTU, source1, source1, a->imm);
-
-    gen_set_gpr(a->rd, source1);
-    tcg_temp_free(source1);
-    return true;
+    return gen_arith_imm(ctx, a, &gen_sltu);
 }
 
 static bool trans_xori(DisasContext *ctx, arg_xori *a)
@@ -319,20 +314,17 @@ static bool trans_sub(DisasContext *ctx, arg_sub *a)
 
 static bool trans_sll(DisasContext *ctx, arg_sll *a)
 {
-    gen_arith(ctx, OPC_RISC_SLL, a->rd, a->rs1, a->rs2);
-    return true;
+    return gen_shift(ctx, a, &tcg_gen_shl_tl);
 }
 
 static bool trans_slt(DisasContext *ctx, arg_slt *a)
 {
-    gen_arith(ctx, OPC_RISC_SLT, a->rd, a->rs1, a->rs2);
-    return true;
+    return trans_arith(ctx, a, &gen_slt);
 }
 
 static bool trans_sltu(DisasContext *ctx, arg_sltu *a)
 {
-    gen_arith(ctx, OPC_RISC_SLTU, a->rd, a->rs1, a->rs2);
-    return true;
+    return trans_arith(ctx, a, &gen_sltu);
 }
 
 static bool trans_xor(DisasContext *ctx, arg_xor *a)
@@ -342,14 +334,12 @@ static bool trans_xor(DisasContext *ctx, arg_xor *a)
 
 static bool trans_srl(DisasContext *ctx, arg_srl *a)
 {
-    gen_arith(ctx, OPC_RISC_SRL, a->rd, a->rs1, a->rs2);
-    return true;
+    return gen_shift(ctx, a, &tcg_gen_shr_tl);
 }
 
 static bool trans_sra(DisasContext *ctx, arg_sra *a)
 {
-    gen_arith(ctx, OPC_RISC_SRA, a->rd, a->rs1, a->rs2);
-    return true;
+    return gen_shift(ctx, a, &tcg_gen_sar_tl);
 }
 
 static bool trans_or(DisasContext *ctx, arg_or *a)
@@ -418,19 +408,67 @@ static bool trans_subw(DisasContext *ctx, arg_subw *a)
 
 static bool trans_sllw(DisasContext *ctx, arg_sllw *a)
 {
-    gen_arith(ctx, OPC_RISC_SLLW, a->rd, a->rs1, a->rs2);
+    TCGv source1 = tcg_temp_new();
+    TCGv source2 = tcg_temp_new();
+
+    gen_get_gpr(source1, a->rs1);
+    gen_get_gpr(source2, a->rs2);
+
+    if (a->rs2 != 0) {
+        tcg_gen_andi_tl(source2, source2, 0x1F);
+        tcg_gen_shl_tl(source1, source1, source2);
+    }
+
+    tcg_gen_ext32s_tl(source1, source1);
+    gen_set_gpr(a->rd, source1);
+    tcg_temp_free(source1);
+    tcg_temp_free(source2);
     return true;
 }
 
 static bool trans_srlw(DisasContext *ctx, arg_srlw *a)
 {
-    gen_arith(ctx, OPC_RISC_SRLW, a->rd, a->rs1, a->rs2);
+    TCGv source1 = tcg_temp_new();
+    TCGv source2 = tcg_temp_new();
+
+    gen_get_gpr(source1, a->rs1);
+    gen_get_gpr(source2, a->rs2);
+
+    /* clear upper 32 */
+    tcg_gen_ext32u_tl(source1, source1);
+
+    if (a->rs2 != 0) {
+        tcg_gen_andi_tl(source2, source2, 0x1F);
+        tcg_gen_shr_tl(source1, source1, source2);
+    }
+
+    tcg_gen_ext32s_tl(source1, source1);
+    gen_set_gpr(a->rd, source1);
+    tcg_temp_free(source1);
+    tcg_temp_free(source2);
     return true;
 }
 
 static bool trans_sraw(DisasContext *ctx, arg_sraw *a)
 {
-    gen_arith(ctx, OPC_RISC_SRAW, a->rd, a->rs1, a->rs2);
+    TCGv source1 = tcg_temp_new();
+    TCGv source2 = tcg_temp_new();
+
+    gen_get_gpr(source1, a->rs1);
+    gen_get_gpr(source2, a->rs2);
+
+    /*
+     * first, trick to get it to act like working on 32 bits (get rid of
+     * upper 32, sign extend to fill space)
+     */
+    tcg_gen_ext32s_tl(source1, source1);
+    tcg_gen_andi_tl(source2, source2, 0x1F);
+    tcg_gen_sar_tl(source1, source1, source2);
+
+    gen_set_gpr(a->rd, source1);
+    tcg_temp_free(source1);
+    tcg_temp_free(source2);
+
     return true;
 }
 #endif
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index f691cbcd80..442c7d26a3 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -192,47 +192,6 @@ static void gen_arith(DisasContext *ctx, uint32_t opc, int rd, int rs1,
     gen_get_gpr(source2, rs2);
 
     switch (opc) {
-#if defined(TARGET_RISCV64)
-    case OPC_RISC_SLLW:
-        tcg_gen_andi_tl(source2, source2, 0x1F);
-        tcg_gen_shl_tl(source1, source1, source2);
-        break;
-#endif
-    case OPC_RISC_SLL:
-        tcg_gen_andi_tl(source2, source2, TARGET_LONG_BITS - 1);
-        tcg_gen_shl_tl(source1, source1, source2);
-        break;
-    case OPC_RISC_SLT:
-        tcg_gen_setcond_tl(TCG_COND_LT, source1, source1, source2);
-        break;
-    case OPC_RISC_SLTU:
-        tcg_gen_setcond_tl(TCG_COND_LTU, source1, source1, source2);
-        break;
-#if defined(TARGET_RISCV64)
-    case OPC_RISC_SRLW:
-        /* clear upper 32 */
-        tcg_gen_ext32u_tl(source1, source1);
-        tcg_gen_andi_tl(source2, source2, 0x1F);
-        tcg_gen_shr_tl(source1, source1, source2);
-        break;
-#endif
-    case OPC_RISC_SRL:
-        tcg_gen_andi_tl(source2, source2, TARGET_LONG_BITS - 1);
-        tcg_gen_shr_tl(source1, source1, source2);
-        break;
-#if defined(TARGET_RISCV64)
-    case OPC_RISC_SRAW:
-        /* first, trick to get it to act like working on 32 bits (get rid of
-        upper 32, sign extend to fill space) */
-        tcg_gen_ext32s_tl(source1, source1);
-        tcg_gen_andi_tl(source2, source2, 0x1F);
-        tcg_gen_sar_tl(source1, source1, source2);
-        break;
-#endif
-    case OPC_RISC_SRA:
-        tcg_gen_andi_tl(source2, source2, TARGET_LONG_BITS - 1);
-        tcg_gen_sar_tl(source1, source1, source2);
-        break;
     CASE_OP_32_64(OPC_RISC_MUL):
         tcg_gen_mul_tl(source1, source1, source2);
         break;
@@ -653,6 +612,24 @@ static bool trans_arith(DisasContext *ctx, arg_r *a,
     return true;
 }
 
+static bool gen_shift(DisasContext *ctx, arg_r *a,
+                        void(*func)(TCGv, TCGv, TCGv))
+{
+    TCGv source1 = tcg_temp_new();
+    TCGv source2 = tcg_temp_new();
+
+    gen_get_gpr(source1, a->rs1);
+    gen_get_gpr(source2, a->rs2);
+
+    tcg_gen_andi_tl(source2, source2, TARGET_LONG_BITS - 1);
+    (*func)(source1, source1, source2);
+
+    gen_set_gpr(a->rd, source1);
+    tcg_temp_free(source1);
+    tcg_temp_free(source2);
+    return true;
+}
+
 /* Include insn module translation function */
 #include "insn_trans/trans_rvi.inc.c"
 #include "insn_trans/trans_rvm.inc.c"
-- 
2.20.1

  parent reply	other threads:[~2019-01-18 13:16 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-18 13:14 [Qemu-devel] [PATCH v4 00/35] target/riscv: Convert to decodetree Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 01/35] target/riscv: Move CPURISCVState pointer to DisasContext Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 02/35] target/riscv: Activate decodetree and implemnt LUI & AUIPC Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 03/35] target/riscv: Convert RVXI branch insns to decodetree Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 04/35] target/riscv: Convert RV32I load/store " Bastian Koppelmann
2019-01-19 21:20   ` Richard Henderson
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 05/35] target/riscv: Convert RV64I " Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 06/35] target/riscv: Convert RVXI arithmetic " Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 07/35] target/riscv: Convert RVXI fence " Bastian Koppelmann
2019-01-19 21:29   ` Richard Henderson
2019-01-21  9:05     ` Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 08/35] target/riscv: Convert RVXI csr " Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 09/35] target/riscv: Convert RVXM " Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 10/35] target/riscv: Convert RV32A " Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 11/35] target/riscv: Convert RV64A " Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 12/35] target/riscv: Convert RV32F " Bastian Koppelmann
2019-01-19 21:51   ` Richard Henderson
2019-01-21  9:06     ` Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 13/35] target/riscv: Convert RV64F " Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 14/35] target/riscv: Convert RV32D " Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 15/35] target/riscv: Convert RV64D " Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 16/35] target/riscv: Convert RV priv " Bastian Koppelmann
2019-01-19 21:56   ` Richard Henderson
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 17/35] target/riscv: Convert quadrant 0 of RVXC " Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 18/35] target/riscv: Convert quadrant 1 " Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 19/35] target/riscv: Convert quadrant 2 " Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 20/35] target/riscv: Remove gen_jalr() Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 21/35] target/riscv: Remove manual decoding from gen_branch() Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 22/35] target/riscv: Remove manual decoding from gen_load() Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 23/35] target/riscv: Remove manual decoding from gen_store() Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 24/35] target/riscv: Move gen_arith_imm() decoding into trans_* functions Bastian Koppelmann
2019-01-20  1:24   ` Richard Henderson
2019-01-21  9:07     ` Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 25/35] target/riscv: make ADD/SUB/OR/XOR/AND insn use arg lists Bastian Koppelmann
2019-01-18 13:14 ` Bastian Koppelmann [this message]
2019-01-20  1:43   ` [Qemu-devel] [PATCH v4 26/35] target/riscv: Remove shift and slt insn manual decoding Richard Henderson
2019-01-21  9:10     ` Bastian Koppelmann
2019-01-21 23:22       ` Richard Henderson
2019-01-22  9:00         ` Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 27/35] target/riscv: Remove manual decoding of RV32/64M insn Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 28/35] target/riscv: Rename trans_arith to gen_arith Bastian Koppelmann
2019-01-20  1:48   ` Richard Henderson
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 29/35] target/riscv: Remove gen_system() Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 30/35] target/riscv: Remove decode_RV32_64G() Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 31/35] target/riscv: Convert @cs_2 insns to share translation functions<Paste> Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 32/35] target/riscv: Convert @cl_d, @cl_w, @cs_d, @cs_w insns Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 33/35] target/riscv: Splice fsw_sd and flw_ld for riscv32 vs riscv64 Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 34/35] target/riscv: Splice remaining compressed insn pairs " Bastian Koppelmann
2019-01-18 13:14 ` [Qemu-devel] [PATCH v4 35/35] target/riscv: Remaining rvc insn reuse 32 bit translators Bastian Koppelmann
2019-01-31 17:59 ` [Qemu-devel] [PATCH v4 00/35] target/riscv: Convert to decodetree no-reply

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